{"id":490,"date":"2009-06-11T23:26:00","date_gmt":"2009-06-12T03:26:00","guid":{"rendered":"http:\/\/johncohn.org\/base\/2009\/06\/11\/thrusday-night-open-source-open-sores\/"},"modified":"2009-06-11T23:26:00","modified_gmt":"2009-06-12T03:26:00","slug":"thrusday-night-open-source-open-sores","status":"publish","type":"post","link":"http:\/\/johncohn.org\/base\/2009\/06\/11\/thrusday-night-open-source-open-sores\/","title":{"rendered":"Thrusday night – open source \/ open sores"},"content":{"rendered":"
\n
Got home so late last night after that long but productive trip to NY.. I paid for it today.. I am home with a virus of some sort.. I’m fevery and achy… and I have open sores on my tongue… yuck !\u00a0 ..
\u00a0\u00a0 It dodn’t slow me down though. I had a very productive day just working from home. I’m spending lots of time on the phone talking to new folks abotu soem ideas I have.. it’s fun meeting these new folks. Speaking of new folks and open sores…\u00a0 A chance meeting aI had at makerfaire has turned out to be pretty productive. I was wearign the\u00a0 LED color changing halo that I often wear at events… I ran into a guy , Xander H. at one of the booths who recognized the chips that I was using in my halo.. and asked me how I’d figured them out. . Readers of this blog may recall that I struggled mightely to figure out the inner workigns of those chips back before christmas as I was maign headbands for both boys.\u00a0\u00a0\u00a0 Anyway.. Xander had been struggling with the same horrible chineese documentation that I’d had to work through.. We exchenged busness cards.. then email.. and finally source doe.. and the result is a cool new opensource librbary Xander wrote for driving these strips. I love that this chance meeting at th Faire led to a contribution to geek culture..\u00a0\u00a0 It really is world 2.0 <\/p>\n

.r{}* LEDStrip – Arduino driver for HL1606-based LED strips<\/div>\n

\u00a0* Thanks to: John M Cohn<\/div>\n
\u00a0* Copyright (c) 2009, Synoptic Labs<\/div>\n
\u00a0* All rights reserved.<\/div>\n
\u00a0* <\/div>\n
\u00a0* Redistribution and use in source and binary forms, with or without<\/div>\n
\u00a0* modification, are permitted provided that the following conditions are met:<\/div>\n
\u00a0* \u00a0 * Redistributions of source code must retain the above copyright<\/div>\n
\u00a0* \u00a0 \u00a0 notice, this list of conditions and the following disclaimer.<\/div>\n
\u00a0* \u00a0 * Redistributions in binary form must reproduce the above copyright<\/div>\n
\u00a0* \u00a0 \u00a0 notice, this list of conditions and the following disclaimer in the<\/div>\n
\u00a0* \u00a0 \u00a0 documentation and\/or other materials provided with the distribution.<\/div>\n
\u00a0* \u00a0 * Neither the name of the .. nor the<\/div>\n
\u00a0* \u00a0 \u00a0 names of its contributors may be used to endorse or promote products<\/div>\n
\u00a0* \u00a0 \u00a0 derived from this software without specific prior written permission.<\/div>\n
\u00a0*<\/div>\n
\u00a0* THIS SOFTWARE IS PROVIDED BY SYNOPTIC LABS ”AS IS” AND ANY<\/div>\n
\u00a0* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED<\/div>\n
\u00a0* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE<\/div>\n
\u00a0* DISCLAIMED. IN NO EVENT SHALL SYNOPTIC LABS BE LIABLE FOR ANY<\/div>\n
\u00a0* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES<\/div>\n
\u00a0* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;<\/div>\n
\u00a0* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND<\/div>\n
\u00a0* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT<\/div>\n
\u00a0* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS<\/div>\n
\u00a0* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.<\/div>\n
*\/<\/div>\n
<\/div>\n
#include “WConstants.h”<\/div>\n
#include “LEDStrip.h”<\/div>\n
<\/div>\n
LEDStrip::LEDStrip(int dPin, int sPin, int latchPin, int clkPin) <\/div>\n
{<\/div>\n
\u00a0 _dPin = dPin;<\/div>\n
\u00a0 _sPin = sPin;<\/div>\n
\u00a0 _latchPin = latchPin;<\/div>\n
\u00a0 _clkPin = clkPin;<\/div>\n
\u00a0 _faderEnabled = 0;<\/div>\n
\u00a0 <\/div>\n
\u00a0 digitalWrite(_dPin, LOW);<\/div>\n
\u00a0 pinMode(_dPin, OUTPUT);<\/div>\n
\u00a0 digitalWrite(_sPin, LOW);<\/div>\n
\u00a0 pinMode(_sPin, OUTPUT);<\/div>\n
\u00a0 digitalWrite(_latchPin, LOW);<\/div>\n
\u00a0 pinMode(_latchPin, OUTPUT);<\/div>\n
\u00a0 digitalWrite(_clkPin, LOW);<\/div>\n
\u00a0 pinMode(_clkPin, OUTPUT);<\/div>\n
}<\/div>\n
<\/div>\n
void LEDStrip::faderCrank()<\/div>\n
{<\/div>\n
\u00a0 unsigned long mymillis;<\/div>\n
\u00a0 <\/div>\n
\u00a0 if (!_faderEnabled) return;<\/div>\n
<\/div>\n
\u00a0 mymillis = millis();<\/div>\n
<\/div>\n
\u00a0 \/\/ Give us 250ms slop in case we don’t exactly catch our edge.<\/div>\n
\u00a0 if (mymillis >= _faderPulseNextEdge && mymillis < _faderPulseNextEdge + 250) {<\/div>\n
\u00a0 \u00a0 if (digitalRead(_sPin) == HIGH) {<\/div>\n
\u00a0 \u00a0 \u00a0 digitalWrite(_sPin, LOW);<\/div>\n
\u00a0 \u00a0 } else {<\/div>\n
\u00a0 \u00a0 \u00a0 \/\/ only load new value of _faderPulseHalfWidth on rising edge<\/div>\n
\u00a0 \u00a0 \u00a0 digitalWrite(_sPin, HIGH);<\/div>\n
\u00a0 \u00a0 \u00a0 _faderPulseHalfWidth = _faderPulseNewHalfWidth;<\/div>\n
\u00a0 \u00a0 }<\/div>\n
<\/div>\n
\u00a0 \u00a0 _faderPulseNextEdge = mymillis + _faderPulseHalfWidth;<\/div>\n
\u00a0 }<\/div>\n
}<\/div>\n
<\/div>\n
unsigned int LEDStrip::faderSpeedGet()<\/div>\n
{<\/div>\n
\u00a0 return _faderPulseHalfWidth;<\/div>\n
}<\/div>\n
<\/div>\n
void LEDStrip::faderSpeedSet(unsigned int halfWidthms)<\/div>\n
{<\/div>\n
\u00a0 if (halfWidthms == 0) {<\/div>\n
\u00a0 \u00a0 _faderEnabled = 0;<\/div>\n
\u00a0 \u00a0 _faderPulseHalfWidth = 0;<\/div>\n
\u00a0 \u00a0 _faderPulseNewHalfWidth = 0;<\/div>\n
\u00a0 \u00a0 digitalWrite(_sPin, LOW);<\/div>\n
\u00a0 \u00a0 return; \u00a0 <\/div>\n
\u00a0 }<\/div>\n
<\/div>\n
\u00a0 _faderPulseNewHalfWidth = halfWidthms;<\/div>\n
\u00a0 <\/div>\n
\u00a0 \/\/ if we’re already running, don’t re-init _faderPulseNextEdge<\/div>\n
\u00a0 if (_faderEnabled != 1) { \u00a0\/\/ starting from non-running state, <\/div>\n
\u00a0 \u00a0 _faderEnabled = 1;<\/div>\n
<\/div>\n
\u00a0 \u00a0 digitalWrite(_sPin, HIGH);<\/div>\n
\u00a0 \u00a0 _faderPulseHalfWidth = halfWidthms;<\/div>\n
\u00a0 \u00a0 _faderPulseNextEdge = millis() + _faderPulseHalfWidth;<\/div>\n
\u00a0 }<\/div>\n
}<\/div>\n
<\/div>\n
.r{}* word consisting of 8 bits. \u00a0Command word is clocked out MSB first (i.e. D8<\/div>\n
\u00a0* is first bit sent)<\/div>\n
\u00a0*<\/div>\n
\u00a0* Format of command word (using conventions in datasheet):<\/div>\n
\u00a0* \u00a0 ________________________________________________________________________<\/div>\n
\u00a0* \u00a0| \u00a0 D1 \u00a0 | \u00a0 D2 \u00a0 | \u00a0 D3 \u00a0 | \u00a0 D4 \u00a0 | \u00a0 D5 \u00a0 | \u00a0 D6 \u00a0 | \u00a0 D7 \u00a0 | \u00a0 \u00a0D8 \u00a0 |<\/div>\n
\u00a0* \u00a0 ————————————————————————<\/div>\n
\u00a0* \u00a0 ________________________________________________________________________<\/div>\n
\u00a0* \u00a0| \u00a0 \u00a0 LED1 CMD \u00a0 \u00a0| \u00a0 \u00a0LED2 CMD \u00a0 \u00a0 | \u00a0 \u00a0LED3 CMD \u00a0 \u00a0 | \u00a0 2X \u00a0 | LatchOK |<\/div>\n
\u00a0* \u00a0 ————————————————————————<\/div>\n
\u00a0*<\/div>\n
\u00a0* \u00a0 LED{1,2,3} CMD –<\/div>\n
\u00a0* \u00a0 \u00a0 \u00a0 00 – LED off<\/div>\n
\u00a0* \u00a0 \u00a0 \u00a0 01 – LED on (max bright)<\/div>\n
\u00a0* \u00a0 \u00a0 \u00a0 10 – LED fade up \u00a0 (start at min bright)<\/div>\n
\u00a0* \u00a0 \u00a0 \u00a0 11 – LED fade down (start at max bright)<\/div>\n
\u00a0*<\/div>\n
\u00a0* \u00a0 2X – Double fade speed<\/div>\n
\u00a0* \u00a0 \u00a0 \u00a0 0 – 1X fade speed, each pulse on SI line steps brightness by 1\/128th.<\/div>\n
\u00a0* \u00a0 \u00a0 \u00a0 1 – 2X fade speed, each pulse on SI line steps brightness by 1\/64th. \u00a0 \u00a0<\/div>\n
\u00a0*<\/div>\n
\u00a0* \u00a0 LatchOK – Enable latch. \u00a0Set to 0 to insert ‘white space’ in the serial<\/div>\n
\u00a0* \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 chain. \u00a0If set to 0, the entire CMD is ignored.<\/div>\n
\u00a0* \u00a0 \u00a0 \u00a0 0 – Do not latch this CMD when Latch is thrown.<\/div>\n
\u00a0* \u00a0 \u00a0 \u00a0 1 – Latch CMD as normal when Latch is thrown.<\/div>\n
\u00a0*<\/div>\n
*\/<\/div>\n
<\/div>\n
\/\/ Push a color value down the strip, setting the latch-enable flag.<\/div>\n
void LEDStrip::rgbPush(uint8_t redcmd, uint8_t greencmd, uint8_t bluecmd)<\/div>\n
{<\/div>\n
\u00a0 uint8_t cmd = 0;<\/div>\n
\u00a0 uint8_t flags = LATCH;<\/div>\n
<\/div>\n
\u00a0 if (redcmd >= NONCMD || bluecmd >= NONCMD || greencmd >= NONCMD) return;<\/div>\n
<\/div>\n
\u00a0 cmd |= (greencmd << 4) & (_BV(5) | _BV(4));<\/div>\n
\u00a0 cmd |= (redcmd << 2) & (_BV(3) | _BV(2));<\/div>\n
\u00a0 cmd |= (bluecmd) & (_BV(1) | _BV(0));<\/div>\n
\u00a0 cmd |= flags & (_BV(6) | _BV(7)); <\/div>\n
<\/div>\n
\u00a0 pushCmd(cmd);<\/div>\n
}<\/div>\n
<\/div>\n
void LEDStrip::rgbPush2X(uint8_t redcmd, uint8_t greencmd, uint8_t bluecmd)<\/div>\n
{<\/div>\n
\u00a0 uint8_t cmd = 0;<\/div>\n
\u00a0 uint8_t flags = LATCH | SPEED2X;<\/div>\n
<\/div>\n
\u00a0 if (redcmd >= NONCMD || bluecmd >= NONCMD || greencmd >= NONCMD) return;<\/div>\n
<\/div>\n
\u00a0 cmd |= (greencmd << 4) & (_BV(5) | _BV(4));<\/div>\n
\u00a0 cmd |= (redcmd << 2) & (_BV(3) | _BV(2));<\/div>\n
\u00a0 cmd |= (bluecmd) & (_BV(1) | _BV(0));<\/div>\n
\u00a0 cmd |= flags & (_BV(6) | _BV(7)); <\/div>\n
<\/div>\n
\u00a0 pushCmd(cmd);<\/div>\n
}<\/div>\n
<\/div>\n
void LEDStrip::sPulse()<\/div>\n
{<\/div>\n
\u00a0 if (digitalRead(_sPin) == HIGH) {<\/div>\n
\u00a0 \u00a0 \/\/delay(1);<\/div>\n
\u00a0 \u00a0 digitalWrite(_sPin, LOW);<\/div>\n
\u00a0 \u00a0 delayMicroseconds(1000);<\/div>\n
\u00a0 \u00a0 digitalWrite(_sPin, HIGH);<\/div>\n
\u00a0 \u00a0 delayMicroseconds(1000);<\/div>\n
\u00a0 } else {<\/div>\n
\u00a0 \u00a0 \/\/delay(1);<\/div>\n
\u00a0 \u00a0 digitalWrite(_sPin, HIGH);<\/div>\n
\u00a0 \u00a0 delayMicroseconds(1000);<\/div>\n
\u00a0 \u00a0 digitalWrite(_sPin, LOW);<\/div>\n
\u00a0 \u00a0 delayMicroseconds(1000);<\/div>\n
\u00a0 }<\/div>\n
<\/div>\n
}<\/div>\n
<\/div>\n
\/\/ Push a blank value down the strip, not setting latch-enable flag. \u00a0<\/div>\n
\/\/ Does not affect the status of a particular LED when latched. \u00a0It’s<\/div>\n
\/\/ like using whitespace.<\/div>\n
void LEDStrip::blankPush()<\/div>\n
{<\/div>\n
\u00a0 pushCmd(0); <\/div>\n
}<\/div>\n
<\/div>\n
void LEDStrip::pushCmd(uint8_t cmd)<\/div>\n
{<\/div>\n
\u00a0 shiftOut(_dPin, _clkPin, MSBFIRST, cmd);<\/div>\n
}<\/div>\n
<\/div>\n
void LEDStrip::latch()<\/div>\n
{<\/div>\n
\u00a0 digitalWrite(_latchPin, HIGH);<\/div>\n
\u00a0 delayMicroseconds(1); \u00a0\/\/ spec sheet specifies minimum latch pulse of 1us<\/div>\n
\u00a0 digitalWrite(_latchPin, LOW);
}<\/p>\n<\/div>\n

OK… I still feel yucky. Early to bed for me.. nte folks.. Nite Sam
-me<\/p>\n

ps. I just got an IM from my freind carl. He’s on a boat in the middle of the baltic ocean.. 1AM and still sunny there… technology is wonderful<\/p>\n

\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Got home so late last night after that long but productive trip to NY.. I paid for it today.. I am home with a virus of some sort.. I’m fevery and achy… and I have open sores on my tongue… yuck !\u00a0 .. \u00a0\u00a0 It dodn’t slow me down though. I had a very productive … Continue reading Thrusday night – open source \/ open sores<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"enabled":false},"version":2}},"categories":[1],"tags":[],"class_list":["post-490","post","type-post","status-publish","format-standard","hentry"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"http:\/\/johncohn.org\/base\/wp-json\/wp\/v2\/posts\/490","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/johncohn.org\/base\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/johncohn.org\/base\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/johncohn.org\/base\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/johncohn.org\/base\/wp-json\/wp\/v2\/comments?post=490"}],"version-history":[{"count":0,"href":"http:\/\/johncohn.org\/base\/wp-json\/wp\/v2\/posts\/490\/revisions"}],"wp:attachment":[{"href":"http:\/\/johncohn.org\/base\/wp-json\/wp\/v2\/media?parent=490"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/johncohn.org\/base\/wp-json\/wp\/v2\/categories?post=490"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/johncohn.org\/base\/wp-json\/wp\/v2\/tags?post=490"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}